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1.55 μm high-power large optical cavity lasers (1991)

Zhong, J. C. ; Zhu, B. R. ; Li, R. H. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 59 (1991), S. 3087-3089

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: A high-power 1.55 μm large optical cavity (LOC) laser structure is successfully prepared for the first time by reasonably designing its configuration and by using a proper single step liquid phase epitaxy (LPE) so as to realize lasers with peak output power higher than 2 W per facet in pulsed operation at room temperature. The devices are also characterized by their lower threshold current ( Jth≤2.7 KA/cm2 for broad area contact structure) and high-temperature stability (T0≈130 K). At the same time they are of long-lived operation and are an ideal source of light in this spectral region.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.105797

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Polymer encapsulated packing material for reversed phase liquid chromatography (1994)

Zuo, Y. M. ; Zhu, B. R. ; Liao, Y. ; [et al.]

Springer

Chromatographia 38 (1994), S. 756-760

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ISSN: 1612-1112

Keywords: Column liquid chromatography ; Polymer encapsulated packings ; Poly(ethylstyrene-divinylbenzene) ; Preparation and evaluation

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Summary A series of polymer-encapsulated packing materials for reversed phase high-performance liquid chromatography was prepared by radical polymerization of ethylstyrene and divinylbenzene with vinyl-modified silica in solution. Some characteristics such as polymer structure, swelling propensity, residual silanols, column efficiency and retention properties were evaluated. Such material is easy to pack and yields high column efficiencies. Its superior performance for the separation of mixtures of aromatic hydrocarbons, amino- and hydroxyl group containing compounds are demonstrated by several examples.